Pin barrel selector armature retaining type



July 11, 1933. H, KRUM 1,917,308

PIN BARREL SELECTOR ARMATURE RETAINING TYPE Original Filed Jan. 30, 1930 INVENTOR amzra Z mY/M MYW ATTORNEYS Patented July 11 1933 UNITED STATES PATENT oFFic I HOWARD L. KRUM, or KENILWORTH, ILLINOIS, AssIGNoR To TELETYPE CORPORATION,

or CHICAGO, ILLINoIs; A CORPORATION or DELAWARE I PIN BARREL SELECTOR ARMATURE RETAINING rizrn Application filed January 30, 1930, Serial No. 424,643. Renewed September 29, 1932.

The present invention relates to selector imechanisms such as are employedfor effecting the operation of telegraph receivers, printers, stock quotation recorders, remote :3 control. apparatus and the like.

. More particularly the present invention relates to selector mechanisms comprising selector. units Which are adapted to be positioned or conditioned in different combinations in response tocode signals comprising permutations of selecting conditions extending through a predetermined number of time intervals.

' My invention is especially adapted for aplector elements are mechanically set under the joint control of locally driven means such as a rotatin-g'shaft and a member or members actuated by magnetic means in, response to the received code combinations of selecting conditions. In such mechanisms the setting ofthe selectors is controlled predetermined by the vibratory movement of a magnet armature 01' armatures,-or ofa member or mem- .bers actuated thereby, and each setting operparticularly in the start-stop systems in which the locally actuated member is stopped at the end of each code combination of selecting conditions, and is started into operation by a starting condition Which precedes the selecting intervals of each code combinat-ion.,-i V Y A problem that arises in such selector mechanisms is that the operating magnet or magnets must move fairly heavy mechanical elements and consequently must :perform more Work than relays in electrical types of selectors which have'but to move their ary matures to actuate electrical contacts. Where the operating magnet is included directly in .the .line circuit without a line relay and local source of current, the length of line upon 0 which mechanical selector mechanisms may operation of relays.

plication to selector mechanism in Which se-.

be used has heretofore been limited because the requirements of the linecurrent for such.

a selector isgreater than-if required for the A primaryobject of myinvention is therefore to provide selector mechanisms of the mechanical types, in which the amount of Work performed by the electrically operated controlling element-s responsive to received selecting con-ditionsis reduced to a minimum.

Another objectv of my invention is to provide a selector mechanism accurately responsive to small currents and attenuated signals. A further object of the present invention is to provide selector -mechanisms having control magnets of the polar type in combination with novel means for removing all restraint from the armature of the magnet prior to the impulse intervals.

My present invention is capable of Wide modifications and adaptable to many types of electrically controlled selector mecha- -nisms,- and may be applied to mechanisms controlled by neutral or polar magnets. In applyingmy invention to a neutral magnet type of selector mechanism I employ the principle that the amount of current Which an electro-magnet requires to hold its armature in attracted-position is a small fraction of the amount of current the electro-inagnet required to attract its armature from a distance. In such embodiments of my invention,

I preferably provide a means entirely independent of the electro-magnet for moving the armature into engagement or near-engagement With the core of the electrosmagnet. In

7 applying my invention to a polar magnet type of selector mechanism I preferably. pro-.

vide a means entirely independent ofthe magnet for removing all restraint against -operat1onof the armature during impulse intervals, particularly such restraint as may be produced by the mechanical selector ele ments. In both embodiments of my invention hereinafter disclosed in detail, I employ a power driven cam or star wheel as the means for efiecting the desired'result;- How be obvious to-those skilled in the art.

ever, other equivalent means may be empl-oy'ed for producing the same result, as Will. m0 1 The various features and the foregoing as well as other objects of the invention will be apparent upon reference to the following detail description taken in connection with the accompanying drawing, while the scope of the invention will be particularly pointed out in the appended claims. 7

I In the drawing: 7

Figure 1 is a plan view of the selector of the sword-and-T type, controlled by a neutral magnet, with portions omitted and broken away to reveal the essential operating mem bers, and in which my invention is embodied. Figure 2 is an elevation of selected parts of the mechanism shown in Figure 1. I t

Figure 3 is a plan view of the orientation elements of the selector shown in Figure 1.

Figure 4 is a section and view on the line 4 iof Figure 3showing the starting members and disclosing also features of orientation embodied in my invention.

Figure 5 is a viewsimilar to'Figure 1 and shows a modified form of selector in which the control is by apolar line magnet instead of by a neutralline magnet.

Similar numerals refer to similar parts throughout the several views. 1 1

Referring :to Figures 1 and 2, the details of the selector mechanism disclosed are shown onlyv in sufficient detail to enablean understanding of the present invention to be had.

For a full understanding of'details not disclosed herein and which form no part of the present invention, reference may be had to Patent 5h: 1,745,633, granted Feb. 1, 1930 to Sterling Morton and Howard L. Krum.

This mechanism comprises a set of five selectors in the form of thin fiat fingerslO arranged one above another between the guide plates 11. These plates are mounted on studs 12 and spaced by washers (not shown) The circular rear ends 10a of the fingers 10 en gage corresponding sockets 10b in five thin fiat bell-cranks 13' all'pivoted on one shaft 14. Individual springs 15 normallyhold the bell cranks and selector fingers in the posit-ion 7 shown in Figures 1 and 2 with the pointed rear'end 16 of thebell-cranks adjacent to the cam barrel 1'? on shaft 18, which is continuously driven by a properly regulated motor when the selector is in operation.

The cam barrel 17 '(Fig. 2) has a spirally arranged seriesof'cams 21, onefor each of the bell-cranks 13, which rotate the five bellcranks 13 in succession'and thus reciprocate longitudinally thesuccession of selector fingers 10 as the cam barrel is rotated; In addition to the longitudinal movement, the selectorfingers 10 have a lateral swinging move ment between the pair of studs 12. t

The setting of any selector finger 10 either to its right hand or to itsleft-hand position is determined by the magnet 22 which is mounted on'a bracket 23 which in turn is V mounted adjustably by screws 21to the plate 25 which forms the base of the entire selector. The magnet armature 28 is fixed to a lever 29. The lever 29 is U-shaped and its end adjacent to the armature is supported upon a pivot stud 30 fixed in the base plate 25. A spring 34 extending between the armature'28 and the adjusting screw 35 tends to move the armature into engagement with the stop 36 but normally magnet 22 is energized and holds the armature against the tension of its spring.v

The free v end of the armature lever 29 is provided with a pair of downwardly extending arms 38. and these arms constitute abutments which cooperate with arms 39 on the rear ends of the selector fingers 10 and act to position the latter in either right hand or left hand position. V The several fingers 10 act through a corresponding number of T-shaped levers 40 to position a set of permutation bars 41. The

T-levers are arranged between the guide plates 11 and are pivotally mounted on a stud 42. The springs 15 normally hold the selector fingers 10 in their forward position and in engagement with the T-levers 40, and each permutation bar-41 thus is held in either one or the other of its two positions accordin to the position of the associated selector nger 10.

'The abutnients 38 on the armature lever 29 are positioned in the rear of the arms 39 of the selector levers 10 but are spaced more closely together than the ends of the arms 39 so that as the armature lever 29 vibrates .in response to the received electrical condi' tions, the abutm-ents 38 alternately move into and out of alinement with the ends of one or the other of theiarms 39 and will cooperate wvith one or the other of the arms 39 as the fingers 10 are reciprocated by the associated bell-cranks and the rotary cam barrel to determine the setting of the fingers or selectors each inits right hand or left hand position. As each'signal pulse is received upon the line magnet 22 the magnet responds to one ofthe two different electrical conditions and :selectively holds its armature lever 29 while the fingers 10 are reciprocatedsuccessively by the cams 21 of the spiral'series on the -'cam barrel 17. The arms 39 are brought into cooperative relation with the abutments 38 1 at the corresponding "signal intervals, thereby setting the selector fingers invariant combinations. l f

In the apparatus as designed and shown, a

considerable distance of' movement is required to shift the arms 38 from the one opcrating position to the other operating position and this would place a considerable burden of work upon the armature 28.

Where the armature 28 operates by a sole source of power, namely, magnet 22, a predetermined electrical current will be required to produce the eflectywhereas, any

a, mechanical assistance given to the armature '28 would reduce the work required from'the 77, h V I plunger 86 extendsthrough the block 85 and "is adapted to engage the bell-crank 84 r and to be 'engaged by the eccentric head of upper arm of thearma-z magnet 22 and thereby reduce the current required to produce the eflect of selection. j 1

In my invention I meet this problem by providing the multiplecam or star Wheel 50' attached rigidly to the cam barrel 17and co-operating with the point-51 upon the armature lever 29. In Figure 1 the teeth of the multiple cam 50 may be distinguished from the cams 21 by the dilferencein radial length. The cams 21 are'five in number, one for each signal, and the teeth of the cam 50 are six in number, one for each signal of the intelligence .code and on e'for the stop signal. WVhen the cam barrel 17 rotates, the engagement of the teeth of cam '50" with the point 51 pushes the armature lever 29 repeatedly and thus re'- peatedly moves the armature 28 bymechanical power'into its operated position near or against the magnet 22. v

The cam barrel is driven from the shaft 18 through the medium ofa friction clutch provided between the able set collar 65.

comprising twopairs of discs each pairhavmg a washer of friction 'materlal (between the discs. The disc is attached rigidly to the shaft 18. The disc 61 is splined to the shaft 18.' The discs 62 are attached rigidly to the cam barrel 17. Friction washers 63 are between the pairs of discs. 7

disc 61 and an adjust- A- stop arm 66 is rigidly attachedfto the cam barrel17 and is provided with {1111111)- turned end which normally engages the lug 67 of the lower varm of the u s'hapedstop gate 68 (Fig.8). The gate-68. is mounted I upon the pivot stud 69 and its upper arm is adapted to be engagedvby the latch 70. The

latch is pivoted'on a journal block 7 5, (Fig,

4) and this journal block and the pivot stud 69 are both mounted upon an adjusting plate 76. The adjusting plate may be rotated about the pivot stud 77 by means of an arm 78 having an operating knob 7 9and may be clamped,

by any well known means, to aplate'80 which j is fixed rigidly to the' frame of the selector.

A spring 81 extending from the gate 68 to the frame of the selector tends to rotate the gateclockwisefas viewed in Figure 3.

The stop arm- 66 tends to rotate the gate in reverse sense.

The latch restrains the gate 68 against the push of the stop arm 66.

The pivot stud 77 and the inner end of the latch 7 0 are in line with the axis ofthe' shaft 18; A spring 83, compressed between the latch 70 and the adjusting plate 76, normally holds the outer end of the latch depressed and in position to engage the upper-farm of the gate 68. A trip member in the form of a small bell-crank 84 is pivotally mountedin a bracket 85 upon the fixed plate 'so that its inner end may engage the inner end of the A spring'tl is' she-ale ad 'withluthe axis er-the ea, stud a screw: 88 onthe -ture.lever29'.

- fTheoperation is as follows During the first line pulse or start inter-' val, WlllClllSQf spacing nature, themagnetl -22is deenergized'and themovement of the armature lever; 29 whichwill be: effected by thespring 34 will cause the screw head 88 to shift theiplunger, 86 and thusr'ock the bellcrank 84. .Theinner end of the bell-crank 84 engagesfthe inner end of the "latch 7 .0 t and.

rocks the latch in its journal block 75 so that the latch disengages itself from the gatel 68. The gate then is rotatedin counter-clockwise "sense as viewedinFig. ,3 bythe pressure of the arm 66 'againstit. "The cycle of 'opcration of the cam barrel 17 thus is-initiated. As

soon as thestop arm166 passes'the endl'67 of wise; by its; spring '81;

pulses comprising thelcode;combination, but

the stop pulse of markingnatureawhichah 05 screwhead 88 from the plunger 86 and will Ways terminates the cyclevvill withdraw the permit the spring 83-to operate the latch 7 0 V and bell-crank 84 the latch :70 being thus left freeto take its normal position to engage the upper arm of thegate 68'. The stop arm 66 then will engage the end 67 of the gate and a will rotate-the gate against its spring 81 until '7 the-gate engages the'latch 70 which willstop i v I both thegate 68 and the, stop arm 66thusi" stopping the cam barrel 17 to whichthejstop" i: ar1n 66is attached; .The parts are so con-= structed that the cambarrel 17' is stopped positively by the gate 68at the endrof each V i I cycle and is' read ily released by the starting movementof the armature lever 29;; Also the trippingarrangement permits the orienta f tion' adjustment. of the gate 68 so that the engagement of themultiple cam'50and its: Co; operating point .517 and the subsequentfen gagement of the first-cam 21 and its co-operating bell-crank 13 will occurduring. the most favorable portion :of ach' impulseiconditi'on of the" received selective code.

The cycle'being thus started 'vvith proper orientation, a. tooth on the multiple cam 56 engages thepoint 51 on the armature'lever v29 and V rocks the armature lever counter tooth on the cam 50 passes the point 51 and conditionthen be a markingimpulse condition, the magnet -221wi11 be; ingenergiz'ed con dition at the timefthatthe. tooth on the cam 56. leaves..th e and accordingly-the clockwise thus moving 'the armature 28 against themagnet '22 andthereafter the L25 releases thed ever 29. 1 Should the "magnet g 7 armature 28 will be held by the magnet-22 even though the magnet be energized toe. degree which would have been insutficient to attract the armature. from its" position against the stop 36 hadthe arinaturenot been operated initially by the tooth on thecam 50.

The armature 28 now being held'by the. magrock the arinatu're'lever 29. to its spacing po- 7 sition that is,against its stop .36.".Accordiiigly, if the first impulse condition had been of spacing nature, the spring gt would. have rocked the armature lever 29to its spacing position as-soon as the tooth on .tliecam 50,

had released-the lever 29 andtthen' the first cam 21 would have rocked the first bell-crank 13 tomove. the firstselectorfinger l toits pacing position. QTlie operation for there- I RhiflllllDQ.lli'lplllse conditions is similar iiicluding the stopliinpulselcondition of marknature,-the..cam 50 being provided with five operating teeth. to operate armaturei28 in accordance with the five selective impulse conditionsand providedi urther with a sixth tooth. for operating thelarmature .28 in prep- (:i'ration for the stop iinpulse@condi-tion which always isof marking nature.

' A modification ofiny'invention is shown .inFigure in which all of the. details are Lthesaine except for the forinof the magnet 92 which replaces the magnet22 of Figure 1 and except that the arm. 28 is. omittedand is replaced by the extension 93 which engages the armature 94L of the. magnet 92. The

magnet 92 is polar iiinature and'operates its 'arinatuie9et in toits solid-line position in responsive to a; signal ,pulse of marking nature and into its dotted-line pos tionvin response to a signal pulse. of spacing nature.

- 'liistop 95'is. provided to limit thefclockwise movement of the extension. 93.1}

"In operation, assuming the-tithe cambarrel 1'7 and cam50 have been startedzinthe manner hei'einbefore 'describeiHa-tooth on the cam 50 engagesthc pointbl on the lever 29 and rocks the. lever 29 counterclockwise :about its pivot 30 to an .extent-sutiicient to permit the armature'tl or" the magnet 92 to inove to'its marking or. SO llCl-llIlQ' pos tion.

--If the impulse "conditionvbeing received is of marking-nature, the magnet 92 will move its armature 94 to its i iark ng position (shown in solid lines) and-then the .toothr'ni ,caii ..5() moves out of engagement-withthe. 1501111151 on the lever 29 and the spring .34

rocks the lever 29 clo ckwise'uiitilthe extension 93 engages the-end .o'i'i tlieiarinature 94.

The-parts then occupy theposition shown in intervals.

solidslines. inrFigure 5.. The. armature, 94: holds thelever 29 in this position While the V first cam-.21 operates the first bell-crank .13 to move the signal finger. lQtoq. is position. Thereafter the next. tooth -on the cam "comes into engagenient with the point 51 on the lever 29,-: and rocks the lever 29 counterclockwiseabout its pivot 30, leaving the armature 94 of the magnet 92 free to move.

J-Should a spacing impulse condition be receivedat this time, the inagiict 92 will move its armature into its spacing position (shown in dotted lines) and then the tooth on the cam 50.nioves out of engagement w th the point bl. on the lever 29-and then-"spring 34: v

IOCkS the lever .29 clockwise about its pivot 30 until the extension 93comes' into engage mentwitli the stop 95. The lever 29 .now occupies its spacingposition so that when 'the,secqiidicamQl-rocks the second bell-crank I 13 the second selector linger :10 will be moved tOlllSSPfiClllg position; T Altl10i1gl1. -tl1G. present invent on has been illustrated and described in connection'with selectors of the -'sW0i'd-a1id-T type, tis oi course obvious that the invent on may be applied to other typesxofselectorswithoutdeparting from tllGSDlIliZ- or essential characteristic thereof. The; present embodiment p is therefore to be considered in all respects as illustrative and n'otfrestrictive, the scope of the. inventionbeing. indicated by, the apbracedithereiii.

lVhat Iclaimanddesireltojsecure by ed StatesLetters. Patent is 1. In combination, an electro-magnet sub ject ,to narkingand spacing impulse condition an armature for said electro-magnet, lfOSillQIlfmOflllS' constantly urgingfsaid armature away from saidelectro-inagnet, power driven means for periodically moving said armatnieinto close proximity with respect to" said elec'tro -inagnet and means for synchronizing the movements of said armature wi th the v impulse intervals.

2. In. ombinatioin;an'electroeinagnet sub-1" ject .tomai'king and spacing impulse conditions, an. armature for Stud ;8lCl3lQrl111gZl0t, mechanicalelement adapted'to occupya pended claims rather than by the foregoing .jdescription and all changes which come g within the meaning and range of equivalency- .of'the claims are therefore intended to be emfirst position in whicliit prevents movement of said armature "or. a second pOSltlOlil n which ll perm ts free movement of saidarmatui'e,

11168118.; constantly urgingsaid element into 'fiistpositien,power driven means for per odieaIly urging. said-element into its second position and means for synchronizing the movements of said: 1

.' 8;-T i rOnibinatioi selector-1 mechanisiii,

fpower driveni.iiieaiis for operating ;said selector mechanism, an electi'oanagnet, a meemeiit "with the impulse chanical element cont-rolled by' said electro magnet in accordance with code combinations of impulse conditions "for controlling said selector mechanism, said mechanical-element having two positions of rest,"meansiconstantly urging said mechanical element into one of its rest positions and additional power driven means for periodically 'moving said mechanical elementinto the other ofits-rest positions.- 1 1 4. In a selector mechanism, a plurality of selectorelements, power driven means for operating said selector elements successively,

a single element cooperating with all of said selector elements for determining the selective operation thereof, an electro-ma 'net re- I sponsive to received electrical impulse "conditions for controlling-said single element, and a second power: driven means operating in timed relation with respectt'o the impulse intervals for periodically operating said 's'n gle elementf' j- 4 5. In a selector mechanism, aplurality of selector fingers, cam means. for operating said fingers successively, a 'lever for controlling theselective'operation of'said fingers,an electro-niagnet responsive to received electrical impulse Conditions for controllingsaid lever and a power driven cam means operating in timed relation wlth respect to the impulse;

intervals for periodically rocking said lever.

6. In combination, selector mechanism, an

' electro-magnet having an armature operaselector fingers, a power driven'means for operating said fingers successively, a lever cooperating with all of said selector fingers for determining the selective operation thereof, an electro-magnet responsive to received electrical impulse conditions, an armature for said electro-magnet carried by said lever, spring means for constantly urging said armature to move away from said electro-magnet and a second power driven means for periodically rocking said lever to move said armature into close proximity with respect to said electro-magne V v 8. In combination,'a selector mechanism, a power driven means for operating said selector mechanism, a lever for controlling the operation of said selector mechanism, an electromagnet responsive to received electrical impulse conditions, an armature for said electro-magnet carried by said lever, spring impulse conditions.

means for constantly urging said; armature to moveaway from said electro-magnet and means tori periodically rocking said lever" to move saidaarmatureinto close proximity with respect to-sa'idelectro-magnet. a

9. In combination, a selector mechanism, a

power driven means foro'perating said selector mechanism, a lever for controlling the operation of said .selector mechanism, an electro-ma'gnetresponsive to received electrical im pulse con ditions,anarmature for said electro-magn'et carriedby said lever, spring means lorconstantly urging said armature away from a said felec'tro-magnet-and a second power drivenmeans for periodically-rocking said lever to 'move'said; armature into close proximity with respect tosaid electro-mag net. f i

y '10. In comb1nat1on, a selector mechanism,

a power driven means for operating saidselector mechanism,a lever forcontrolling the operation of, said selector mechanism, an'elecf' tro-magnet responsive to received electrical 7 impulse conditions, an armature for said electro-ma'gnet carried by said lever; spring ineansyfor constantly urging said armature away from said electro-magnet and 'means for periodically rocking said I lever to" move said armature into close proximity witlr ree spect to said'electro-magnet, said last men--.

tioned means operating in timed relation with respect to said impulse conditions. I

11. In combination, a selector mechanism, a power driven means for operating said selector mechanism, a lever for controlling the operation of said selector mechanism, a polarized magnet responsiveto received electrical impulse conditions, an armature for said polarized magnet-having a predetermined path of movement between two rest. positions in accordance with the impulse conditions, a spring forrocking said lever in a directionto bring one end thereof into the pathof movement of said armature and means for periodically rocking said lever in the opposite direction to move theend thereof out ofthe path of movement of said armature. 12. In combination, a selector mechanism, a-power driven means for operating said selector mechanism, a lever for controlling theoperation oi'said selector mecanism, a

polarized magnet responsive to. received elec trical impulse conditions, an armature for said polarized magnet havlng a predetermined path of movement between two rest 5 positions in accordance with the impulse conditions, a sprlng for rocking sa1d lever in adirection to bring one end of said lever into the path of movementjof said armature A and means for periodically rocking saidleve'r ing in timed relation "with respect to said responsive to code combinations of signal impulses, an armature rforsaid 'electromagnet,

said armature actuated in" accordance with the signal impulses, means coacting with said armature, means for synchronizing the move ments of said means with the impulse interjvels, and means operatively associated with mechanism, a polarized electromagnet re-- bothsaid means and adapted to effect controlling operationsin'said selectors. 7

14. In combination, a-selector mechanism a power driven-Imeans-for operating said sponsive to code combinations of marking and spacing impulse conditions, an armature forsaid electromagnet, the position of said armature determined solely by the nature of the impulse condition, an element adapted to be controlled by said armature in accordance; with said,conditions,. powerdriven means operative synchronously with the speed of, code pulsing to establish -said ele ment periodically in one position to escape said-armature,and biasing means vto determine the coactivityfof said element 'andsaid armature. ,j v

15 In a selective. apparatus, selecting means, a member for controlling the operation of said selecting means, an elect-romage impulse sponsive to received. electrical impulse con; ditions andoperatively associated with said member,'-springmeans for urging said armature to move in response to certaincondinet, an armature. for 7 said xelectromagnet re: s

t-ions of: said electromagnet, and means for periodically rocking said member to control the movement of said armature.- V

16. In a' selective apparatus, selecting means, a member for controlling the operation of saidselecting means, an; electromagnet, anarmature for said electromagnet responsive to received electrical impulse cong 'ditions and operatively associated with said member, spring means for urging said armae ture to move in response to certain conditions of said electrom'agnet, and means forpe riodically rocking said member during jthe interval of the continuance of a predetermined received electrical impulse condition to control-the movement of said armature.

17. In a selective apparatus, selectin means, a line magnet, an armature for said lme magnet responsive to receivedelectr cal conditions, and sprlng-and-cam means associatedwith said armature'for urging said armature to move in accordance with electrical signals impressed .on said magnet. In testimony whereof I aflix myjsi nature, HOWARD L. KitUM. 1 V 

